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include
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cppgc
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internal
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api-constants.h
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atomic-entry-flag.h
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base-page-handle.h
caged-heap-local-data.h
caged-heap.h
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compiler-specific.h
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conditional-stack-allocated.h
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finalizer-trait.h
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gc-info.h
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logging.h
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member-storage.h
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name-trait.h
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persistent-node.h
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pointer-policies.h
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write-barrier.h
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allocation.h
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common.h
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compiler-specific.h
Go to the documentation of this file.
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// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef INCLUDE_CPPGC_INTERNAL_COMPILER_SPECIFIC_H_
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#define INCLUDE_CPPGC_INTERNAL_COMPILER_SPECIFIC_H_
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#include "
v8config.h
"
// NOLINT(build/include_directory)
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namespace
cppgc
{
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#if defined(__has_attribute)
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#define CPPGC_HAS_ATTRIBUTE(FEATURE) __has_attribute(FEATURE)
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#else
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#define CPPGC_HAS_ATTRIBUTE(FEATURE) 0
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#endif
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#if defined(__has_cpp_attribute)
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#define CPPGC_HAS_CPP_ATTRIBUTE(FEATURE) __has_cpp_attribute(FEATURE)
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#else
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#define CPPGC_HAS_CPP_ATTRIBUTE(FEATURE) 0
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#endif
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// [[no_unique_address]] comes in C++20 but supported in clang with -std >=
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// c++11.
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#if defined(V8_CC_MSVC) && CPPGC_HAS_CPP_ATTRIBUTE(msvc::no_unique_address)
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// Unfortunately MSVC ignores [[no_unique_address]] (see
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// https://devblogs.microsoft.com/cppblog/msvc-cpp20-and-the-std-cpp20-switch/#msvc-extensions-and-abi),
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// and clang-cl matches it for ABI compatibility reasons. We need to prefer
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// [[msvc::no_unique_address]] when available if we actually want any effect.
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#define CPPGC_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
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#elif CPPGC_HAS_CPP_ATTRIBUTE(no_unique_address)
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#define CPPGC_NO_UNIQUE_ADDRESS [[no_unique_address]]
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#else
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#define CPPGC_NO_UNIQUE_ADDRESS
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#endif
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#if CPPGC_HAS_ATTRIBUTE(unused)
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#define CPPGC_UNUSED __attribute__((unused))
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#else
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#define CPPGC_UNUSED
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#endif
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}
// namespace cppgc
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#endif
// INCLUDE_CPPGC_INTERNAL_COMPILER_SPECIFIC_H_
cppgc
Definition
allocation.h:38
v8config.h
include
cppgc
internal
compiler-specific.h
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